Method copy

docs/app/js/sanddance-app.js:75621–75627

(array)

        throw new Error("not implemented");
    }
    copy(array) {
        this[0] = array[0];
        this[1] = array[1];
        this[2] = array[2];
        this[3] = Number.isFinite(array[3]) || this.order;
        return this.check();
    }
    set(x = 0, y = 0, z = 0, order) {
        this[0] = x;
        this[1] = y;